@Sigtweed - Natty Shirts is the best person to respond. But I noticed the same thing as you. Particularly on the Green Gingham. When you click on that pattern, the shirt appears on a torso mannequin/model with the fabric in question and the pattern looks like a much larger check than it does in the fabric close up. I emailed customer service and they said this was a problem with the rendering and the actual check size is closer to how it appears on the fabric swatch on the site.

Anyway, I take this to mean that it's hard to really see what the prospective shirt would look like. Clearly, this is still an operation in flux. They've updated their website a number of times over the last 6 weeks as they've been getting input from various fora.